two bombs struck the boston mar thorn as runners were finishing, the bombs plant the in the crowd in an area right next to the finish line where there were hundreds if not thousands of people cheering the runners on. one bomb exploded a little bit before 3:00, about 2:50, and then only seconds later a second bomb two blocks away, also exploded in the crowd. we were-- we were told by boston police some two hours ago that two people were killed but that is the the kind of thing that, unfortunately, is likely to change as time wears on. we have checked with the hospitals in the area, and by our tally, there are about 50 people who are wounded, being treated at the hospital. many are in critical condition. other are not as gravely wounded. we a number of pictures of the actual explosions themselves. let's go to the picture that we have of the first bomb complogd at the finish line. this is video that we received courtesy of the "boston globe" newspaper. that's the finish line bomb. ( screams ) now listen for the next. ( explosion ) and there's the second bomb. it's about two blocks away,